POST UTME BOWEN UNIVERSITY 2019 Biology | Objective

Are you preparing for POST UTME BOWEN UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2019 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a human embryo, the process of gastrulation is initiated by the formation of the primitive streak. What is the primary function of the primitive streak?
A. To form the notochord
B. To establish the anterior-posterior axis
Correct C. To create the embryonic layers
D. To initiate organogenesis

Correct Answer: C

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Question 2
A diagram of the human circulatory system is shown below. What is the function of the pulmonary valve?
A. To regulate blood pressure
Correct B. To control blood flow to the lungs
C. To prevent backflow of blood
D. To pump blood to the aorta

Correct Answer: B

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Question 3
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. What is the expected frequency of the homozygous recessive genotype 'bb'?
Correct A. 0.04
B. 0.08
C. 0.12
D. 0.16

Correct Answer: A

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Question 4
A diagram of the human eye is shown below. What is the primary function of the lens?
Correct A. To focus light on the retina
B. To regulate pupil size
C. To detect light intensity
D. To transmit visual signals to the brain

Correct Answer: A

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Question 5
In a random sample of 1000 individuals, the mean height is 175 cm with a s\tandard deviation of 5 cm. What is the probability that a randomly selected individual has a height greater than 180 cm?
Correct A. 0.0228
B. 0.0446
C. 0.0664
D. 0.0882

Correct Answer: A

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Question 6
In a eukaryotic cell, the \endoplasmic reticulum is involved in the synthesis of proteins that are destined for secretion or for use within the cell. Which of the following statements is true about the \endoplasmic reticulum?
A. The \endoplasmic reticulum is a type of organelle found only in plant cells.
B. The \endoplasmic reticulum is involved in the synthesis of proteins that are destined for use within the cell.
C. The \endoplasmic reticulum is a type of organelle found in both plant and animal cells.
Correct D. The \endoplasmic reticulum is involved in the synthesis of proteins that are destined for secretion.

Correct Answer: D

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Question 7
A patient is diagnosed with a bacterial infection that is resis\tant to multiple antibiotics. Which of the following is a likely consequence of this infection?
Correct A. The patient will experience a rapid decline in their condition.
B. The patient will require a longer duration of antibiotic treatment.
C. The patient will experience a slower rate of recovery.
D. The patient will not require antibiotic treatment.

Correct Answer: A

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Question 8
A neuron is stimulated by an action potential that travels along its axon. Which of the following is a likely consequence of this stimulation?
Correct A. The neuron will release neurotransmitters into the synapse.
B. The neuron will experience a decrease in its excitability.
C. The neuron will experience a rapid decline in its condition.
D. The neuron will not be able to transmit signals.

Correct Answer: A

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Question 9
A patient is diagnosed with a viral infection that is cau\sing inflammation in their liver. Which of the following is a likely consequence of this infection?
A. The patient will experience a rapid decline in their condition.
Correct B. The patient will require a longer duration of antiviral treatment.
C. The patient will experience a slower rate of recovery.
D. The patient will not require antiviral treatment.

Correct Answer: B

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Question 10
A patient is diagnosed with a fungal infection that is cau\sing a skin rash. Which of the following is a likely consequence of this infection?
A. The patient will experience a rapid decline in their condition.
Correct B. The patient will require a longer duration of antifungal treatment.
C. The patient will experience a slower rate of recovery.
D. The patient will not require antifungal treatment.

Correct Answer: B

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Question 11
In a population of 1000 individuals, 70% are homozygous dominant for the gene controlling flower color, 20% are homozygous recessive, and 10% are heterozygous. If the population is randomly sampled, what is the probability that two individuals chosen at random will both be homozygous dominant?
Correct A. 0.49
B. 0.49
C. 0.49
D. 0.49

Correct Answer: A

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Question 12
A 10% solution of a certain subs\tance is diluted to 5% by adding 50 mL of water. How many milliliters of the original solution were used to make the 5% solution?
A. 100 mL
Correct B. 125 mL
C. 150 mL
D. 200 mL

Correct Answer: B

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Question 13
A certain type of bacteria doubles in population every 2 hours. If there are initially 100 bacteria, how many bacteria will there be after 6 hours?
A. 1600
B. 3200
Correct C. 6400
D. 12800

Correct Answer: C

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Question 14
A plant has a certain number of seeds, and each seed produces 8 new seeds. If the plant produces 240 new seeds, how many seeds did the plant originally have?
A. 15
B. 20
C. 25
Correct D. 30

Correct Answer: D

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Question 15
A certain type of insect has a life cycle of 4 weeks. If the insect population starts with 100 individuals, how many individuals will there be after 12 weeks?
A. 400
B. 800
C. 1600
Correct D. 3200

Correct Answer: D

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Question 16
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
Correct A. 0.64
B. 0.36
C. 0.16
D. 0.04

Correct Answer: A

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Question 17
A cell in the G2 phase of the cell cycle has a DNA content of 8C. If the cell undergoes mitosis, what will be the DNA content of the daughter cells?
Correct A. 4C
B. 8C
C. 16C
D. 32C

Correct Answer: A

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Question 18
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the light intensity is increased by a factor of 4, what will be the new photosynthetic rate?
A. 20 μmol CO2 s-1
Correct B. 40 μmol CO2 s-1
C. 80 μmol CO2 s-1
D. 100 μmol CO2 s-1

Correct Answer: B

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Question 19
A 1.5 L solution contains 0.5 M glu\cose. If 0.5 L of this solution is removed, what is the new concentration of glu\cose?
A. 0.25 M
B. 0.5 M
Correct C. 0.75 M
D. 1.0 M

Correct Answer: C

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Question 20
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
Correct A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole

Correct Answer: A

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Question 21
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
Correct A. 0.36
B. 0.64
C. 0.16
D. 0.84

Correct Answer: A

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Question 22
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 0.5 m/s
Correct B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s

Correct Answer: B

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Question 23
A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is permeable to sucrose, what is the concentration of sucrose in the cytosol after 10 minutes?
A. 0.2 M
B. 0.3 M
Correct C. 0.4 M
D. 0.5 M

Correct Answer: C

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Question 24
A 5-year-old child has a body mass of 20 kg and a surface area of 0.5 m^2. If the child's basal metabolic rate is 100 W, what is the child's rate of heat loss?
A. 50 W
B. 75 W
Correct C. 100 W
D. 125 W

Correct Answer: C

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Question 25
A 1.5 L solution contains 0.2 M glu\cose. If 0.5 L of this solution is diluted with water, what is the concentration of glu\cose in the resulting solution?
A. 0.1 M
Correct B. 0.15 M
C. 0.2 M
D. 0.25 M

Correct Answer: B

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